java.io
Class SequenceInputStream

A SequenceInputStream represents
the logical concatenation of other input
streams. It starts out with an ordered
collection of input streams and reads from
the first one until end of file is reached,
whereupon it reads from the second one,
and so on, until end of file is reached
on the last of the contained input streams.

Since:

JDK1.0

Constructor Summary

SequenceInputStream(Enumeration e)
Initializes a newly created SequenceInputStream
by remembering the argument, which must
be an Enumeration that produces
objects whose run-time type is InputStream.

SequenceInputStream(InputStream s1,
InputStream s2)
Initializes a newly
created SequenceInputStream
by remembering the two arguments, which
will be read in order, first s1
and then s2, to provide the
bytes to be read from this SequenceInputStream.

Method Summary

int

available()
Returns the number of bytes available on the current stream.

void

close()
Closes this input stream and releases any system resources
associated with the stream.

SequenceInputStream

Initializes a newly created SequenceInputStream
by remembering the argument, which must
be an Enumeration that produces
objects whose run-time type is InputStream.
The input streams that are produced by
the enumeration will be read, in order,
to provide the bytes to be read from this
SequenceInputStream. After
each input stream from the enumeration
is exhausted, it is closed by calling its
close method.

available

read

Reads the next byte of data from this input stream. The byte is
returned as an int in the range 0 to
255. If no byte is available because the end of the
stream has been reached, the value -1 is returned.
This method blocks until input data is available, the end of the
stream is detected, or an exception is thrown.

This method
tries to read one character from the current substream. If it
reaches the end of the stream, it calls the close
method of the current substream and begins reading from the next
substream.

read

Reads up to len bytes of data from this input stream
into an array of bytes. This method blocks until at least 1 byte
of input is available. If the first argument is null,
up to len bytes are read and discarded.

The read method of SequenceInputStream
tries to read the data from the current substream. If it fails to
read any characters because the substream has reached the end of
the stream, it calls the close method of the current
substream and begins reading from the next substream.

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